Boiler fob



' 2 Sheets-Sheet 1'. W, NiMS.

-Domest-ic Boiler. A .v

No. 4,826. f Y Paiemed oct. 24, 1846.

2 Sheets-Sheet 2. W. NIMS.

l Domestic Boiler.

No. 4,826. Patented 0t.,24,1846,

vNb'm-h- UNITED STATES PATEN T OFFICE.

WARREN NIMS, OF FORT ANN, NEW YORK.

BOILER FOR HEATING LIQUIDS.

Specication of Letters Patent No. 4,826, dated October 24, 1846.

To all whom t may concern Be it known that I, WARREN NiMS, of Fort Ann, in the county of Washington, in the State of New York, have invented'certain new and useful Improvements in the Manner of Constructing Boilers for the Heating of Tanning Liquid and other Fluids; and I do hereby declare that the following is a full and exact description thereof.

In the process of tanning as now carried on, the tanning liquid, which has been allowed to act on the skins until it is nearly spent, is reheated and made to act upon fresh bark so as again to become saturated with tannin.

My boiler has been constructed with a view to its application to the heating of such exhausted tanning liquor, but is equally applicable to the heating of liquids for a variety of other purposes. I construct a boiler of sheet metal in the usual way, and above this I place a reservoir, or cistern, into which the liquid to be heated may be raised from a tan-vat, or other receptacle, by means of a pump. From the bottom of this cistern, a pipe descends and passes through the top of the boiler which is to be kept entirely full of the liquid. Below the boiler is a furnace, or fire chamber, in which wood is to be used as fuel; this fire chamber I divide into two compartments, the number may however be increased, but I deem two sufiicient for all useful purposes. This division into compartments consists merely in a double tier of tubular grate bars to support the fuel. In the boiler that I have assayed, these tubular grate bars are about three inches in diameter; three, or any other preferred number of these are used in each compartment, crossing the fire chamber from side to side. They are closed at their ends and the liquid from the boiler is admitted into them through smaller tubes, say of one inch in diameter, which tubes may enter those which constitute the grate bars near their ends at each side of the fire chamber. The liquid, which thus enters is not to be returned to the boiler but is to be conveyechfrom the larger transverse tubes first named into a tube which rises vertically at the rear end of the boiler to a height equal, or nearly equal to that of the top of the boiler, where it is furnished with a cock by means of which the heated liquid is allowed to run ou and to be conveyed into a vat or other receptacle where it may be wanted.

Under this arrangement, the cold liquor the vertical discharge pipe and in itspassage it is brought to the boiling point. Thecontinuous current thus kept up effectually pro? K tects the pipes from injury by the Vaction of the fire, which is thereby applied to the purpose of heating in the most economical manner.

The discharge of the liquid from the delivery tube is regulated by means of a cockl i as above named which allows a larger quantity to escape when the iire is intense and a smaller when the combustion is more slow. By merely turning this cock the fluid may be allowed to pass off as rapidly as it reaches the boiling point and the respective tubes may'consequently be prevented from attaining a temperature that is much above that point. v

In the accompanying drawing Figure yl is a perspective view of my boiler and the arch, or stack, in which it is set. Fig. 2 is a vertical section thereof through its center from front to back. Fig. 3is a back elevation, the brick work constituting the back wall being removed for the purpose of showing the arrangement of the interior. Fig. 4 is a horizontal section in the line w of Fig. 3.

A is the boiler.

B is a tube opening into it and extending up to a height somewhat greater than that of the liquid contained in the reservoir or cistern from which the boiler is to be supplied.

C is an opening through the boiler which is to receive a tube that proceeds from the bottom of the reservoir, or cistern containing the cold liquid; this cistern is not represented as it is a mere containing vessel of any suitable kind.

D, D, D, are the tubular grate bars, closed at their ends, and having the liquid from the boiler conveyed into .them through the smaller tubes L a ca which open into them and into the boiler, and which liquor is to be subsequently conveyed from them into the ascending or delivery tube E. The direction of these tubes is shown most distinctly in Fig. 2; the three tubes a a a it will beseen,

extend back and around so as to enter the upper tier of tubes D D D' on their lower sides; and the three tubes a a' a' extend back and around so as to enter the three lower grate bar tubes D', D', D', in like manner. A similar arrangement is made through the series of tubes toward each side of the fire chamber.

From the upper tier of grate bar tubes D D D, tubes b b Z) lead into the ascending delivery tube E; and from the lower tier D' D' D' of grate bar tubes, the smaller tubes b' b' b' leadV into a horizontal tube F (Figs 3 and 4) situated in the rear of the tubes D' and into which the lower end of the tube E is inserted so that they concur in performing the same oiiice. By leading the tubes b into the ascending tube E on a level with the upper tier of grate bai` tubes, the tubes b do not interfere with the putting of wood into the furnace as they would do were they curved down and lnade to enter the tube F. The tubes Z2' (shown most distinctly in Figs. 2 and 4) as they pass from thetubes D' into the tube F lie upon the tubes D' and aid in sustaining the fuel.

The pipe E should be extended up to the height of the pipe B and it then serves for the escape of steam and may be considered as performing to the necessary extent the oice of a safety valve; the escape of steam` will, however, be small, as the liquid is allowed to flow off through the cock Gr into a vat or other receptacle as fast as it attains the boiling point; the partial opening and closing of said cock accomplishing lthis end,

H, H, are bars in front of the hollow grate bars,l serving to sustain and to guide the wood to them..

The course of the draft is through flues in the upper part of the stack along the sides and front of the boiler to the chimney I. The rear ends of these lues are seen at J J in Fig. 3 and they are continued in the same manner in fro-nt until they enter the chimney as shown at J in the section Fig. 2.

I-Iaving thus fully described the manner in which I construct and arrange the respective parts of my boiler and furnace for the heating of tanning or other liquids, and shown the operation of the same,

What I claim therein as new and desire to secure by Letters Patent is- The manner of combining the boiler, (which is to be kept full of liquid) with the respective series of hollow grate bars, and with the delivery or discharging tube F, by means of the series of smaller tubes a, a' and b, b', arranged and operating substantially as herein made known.

I do not of course claim the use of grate bars made hollow for the purpose of passing water or other liquid through them, this having been frequently done, but I limit my claim to the special arrangement and combinatio-11 of the respective parts of my apparatus by which it is adapted to the attainment of the end herein proposed.

VARREN NIMS.

Witnesses:

Ti-Ios. P. JONES, I-I. W. BALL, Jr. 

